Automatically-threading shuttle for looms



Patented ti, ldfili.

PATET Fl 'lE.

GEORGE H. WILLARD, OF HQPEDALE, MASSACHUSETTS, ASSIGNOR '10 DBAPER COR- PORATIQN, OF HOPEDALE, MASSACHUSETTS, ll. CORPORATION OF MAINE.

AUTOMATICALLY-THREAIDING SHUTTLE FOB LOOMS.

Application filed. March 31, 1925. Serial No. 19,601.

To all whom it may concern:

Be it known that I, GEORGE H. VVILLARD, a citizen of the United States, and a resident of Hopedale, in the county of Worcese ter and State of Massachusetts, have in vented an Improvement in Automatically- Threading Shuttles for Looms, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to automatically threading shuttles used in looms wherein the weft or filling thread is automatically replenished from time to time, and is more particularly a further development of the automatically threading loom shuttle shown and described in the patent to Edward S.

Stimpson, No. 1,483,492, February 12, 192d. In the automatically threading shuttle of the Stimpson patent, a thread casting and guiding device is shown in the thread passage, the top portion of which is unobstructed, so that upon the formation of a loop or overthrow when the shuttle is brought to rest, the shuttle may become wholly unthreaded, that is, the thread may not only be cast upwardly out of the open top of the thread passage throughoutits length, but it may also be thrown out of the side delivery eye. This type of shuttle has been found in practice to be effective and advantageous in use. In some cases, however, it is desirable to prevent complete unthreading of the shuttle by the thread casting device while yet permitting partial unthreading, and the present invention therefore provides means at the forward end of the open thread passage to prevent com- 4 plete unthreading, while permitting partial unthreading of the shuttle.

Under some weaving conditions, as, for instance, in the use of fluffy or loose yarn, the side delivery eye or the passage leading thereto under the thread director may become clogged, and should the shuttle be wholly unthreaded, such may prevent the ready passage of the thread back into the side delivery eye, so, in accordance with the present invention, an automatically threading shuttle is provided with a side delivery eye and a longitudinally extending thread passage having an open top rearward of the side delivery eye, in which portion of the 515 threading slot is a thread casting device for casting the thread upwardly through the open top of the thread passage on the occurrence of a loop or overthrow, and at the forward end of the thread passage means is provided to prevent complete unthreade0 ing of the shuttle.

The various features and new combination of parts constituting the present invention will best be made clear from the following description and the accompanying t5 drawings of one good form thereof.

In the drawings:

Fig. 1 is a perspective view of the front end portion of a shuttle provided with the present invention; :0

Fig. 2 is an enlarged perspective view of a threading block containing the invention;

Fig. 3 is an end View of the threading block looking from the rear towards the front of the shuttle, or, in other words, from the bobbin chamber frontwardly; and

Fig. 4 is a transverse section of a shuttle containing the present invention and looking towards the forward end thereof.

The shuttle 1 has the usual bobbin chamher 2 in which is mounted the bobbin 3 carrying the filling, and as shown, the shuttle has a bottom opening for the ejection of the filling carrier or bobbin when filling is to be changed.

Frontward of the bobbin chamber is the threading block receiving chamber 4 in which is mounted the threading block of the present invention.

The threading block 5 is provided with a longitudinally extending thread passage 6 which communicates with the side delivery eye 7, and rearward of the side delivery eye where it communicates with the longitudinal thread passage is the thread casting and guiding device 8. The term rearward is herein employed as designating that portion of the structure adjacent the bobbin chamber, and consequently the word frontward means, of course, that part of the structure nearer the end of the shuttle.

As indicated in Figs. 1 and 2, it will be noted that the longitudinally extending thread passage 6 between the side delivery eye and the bobbin chamber has an unobstructed top opening, and in this portion of the threading block, as shown, is located the thread casting and guiding device 8 which consists of a scroll having a base portion 9 secured to the threading block, and rising extending thread passage having an open top rearward of the side delivery eye, a thread casting and guiding device in the thread passage rearward of the side delivery eye for casting the thread upwardly through the open top of the thread passage on the occurrence of a loop or overthrow, and a guard frontward of the side delivery eye to engage the loop or overthrow of thread and prevent complete unthreading of the shuttle.

4:. An automatically threading loom shuttle having a side delivery eye, a threading block provided with a longitudinally extending thread passage open at its top rearward of the side delivery eye, a thread casting and guiding device in the thread passage rearward of the side delivery eye for casting the thread upwardly through the open top of the thread passage on the 00* currence of a loop or overthrow, and means lrontward of the thread casting and guiding device to intercept the loop or overthrow as it is cast from the thread passage to prevent complete unthreading or the shuttle.

5. An automatically threading loom shuttle having a side delivery eye, a threading block provided with a longitudinally extending thread passage open at its top rearward of the side delivery eye, a thread casting and guiding device in the thread passage rearward of the side delivery eye for casting the thread upwardly through the open top of the thread passage on the occurrence of a loop or overthrow, and a thread director and overhanging guard frontward of the thread casting and guiding device to intercept the loop of thread as it is cast from the thread passage and the shuttle is partially unthreaded to prevent complete unthreading of the shuttle.

In testimony whereof, I have signed my name to this specification.

GEORGE H. WILLARD. 

